TypeError when using documents parameter with co.chat()

[ai-yann]

SDK Version (required): 5.11.4

Describe the bug
When trying to use the documents parameter with co.chat() method in the Cohere Python SDK v5.11.4, receiving a TypeError indicating that documents is an unexpected keyword argument.

The error occurs when trying to use the chat endpoint with RAG:

chat_response = co.chat(
    model="command-r-plus-08-2024",
    messages=chat_messages,
    documents=[{
        "data": {"text": doc["text"]}
    } for doc in context_docs],
    temperature=0.2
)

Error Message

TypeError: V2Client.chat() got an unexpected keyword argument 'documents'

Expected Behavior

Based on the Cohere documentation, the chat endpoint should accept a documents parameter for RAG functionality.

Actual Behavior

The SDK throws a TypeError when attempting to use the documents parameter.

Steps to Reproduce

1. Initialize Cohere client with V2 endpoint (co = cohere.ClientV2(...)
2. Prepare chat messages and context documents
3. Call co.chat() with documents parameter

[ai-yann]

The solution: I had to cast id of the documents to be of type string, which the documentation does say. The error message should indicate that document IDs must be strings, like:

'TypeError: Document IDs must be of type string in the documents parameter. Please ensure all document IDs are properly cast to strings before making the chat request.'